Dan - I contacted one of Atoms' approved installers but unfortunately for me, he's too far away (he is based in Fife and he is the nearest). Looks like I'm back to the drawing board in search of another replacement boiler........
OP, any of the independent condensing lift pumps can be used. Grundfos is the one I would recommend, NOT the saniflo one. I always use the Vaillant one on my Vaillant installations.
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